| 摘要 |
The invention provides a blow molding and a method for producing it. The blow molding is lightweight; its strength and rigidity per the unit weight thereof are high; and its heat resistance, sound absorption, heat insulation and sound insulation are all good. The blow molding is produced inexpensively, and is useful for the parts of inlet systems for internal-combustion engines, etc. The blow-molding method is for fiber-containing thermoplastic resins, and comprises holding a parison made of an inorganic fiber-containing, melt-expandable thermoplastic resin, between a pair of facing splits of a mold, blowing the parison to shape it, and thereafter optionally reducing the gaseous pressure inside it to thereby expand the wall of the shaped article. The blow molding is made of a thermoplastic resin, and it contains from 15 to 70% by weight of inorganic fibers having a mean fiber length of from 1 to 20 mm, and has a porosity of from 10 to 90%.
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